<head>
  <style> body { margin: 0; } </style>

  <script type="importmap">{ "imports": {
    "react": "https://esm.sh/react",
    "react-dom": "https://esm.sh/react-dom/client"
  }}</script>

<!--  <script type="module">import * as React from 'react'; window.React = React;</script>-->
<!--  <script src="../../src/packages/react-force-graph-3d/dist/react-force-graph-3d.js" defer></script>-->
</head>

<body>
  <div id="graph"></div>

  <script src="//unpkg.com/@babel/standalone"></script>
  <script type="text/jsx" data-type="module">
    import ForceGraph3D from 'https://esm.sh/react-force-graph-3d?external=react';
    import React, { useRef, useCallback } from 'react';
    import { createRoot } from 'react-dom';

    fetch('../datasets/miserables.json').then(res => res.json()).then(data => {
      const FocusGraph = () => {
        const fgRef = useRef();

        const handleClick = useCallback(node => {
          // Aim at node from outside it
          const distance = 40;
          const distRatio = 1 + distance/Math.hypot(node.x, node.y, node.z);

          fgRef.current.cameraPosition(
            { x: node.x * distRatio, y: node.y * distRatio, z: node.z * distRatio }, // new position
            node, // lookAt ({ x, y, z })
            3000  // ms transition duration
          );
        }, [fgRef]);

        return <ForceGraph3D
          ref={fgRef}
          graphData={data}
          nodeLabel="id"
          nodeAutoColorBy="group"
          onNodeClick={handleClick}
        />;
      };

      createRoot(document.getElementById('graph'))
        .render(<FocusGraph />);
    });
  </script>
</body>